>
> Thanks Bruce. It sounds like we'll have to live with this problem for now?
>
For the lack of better ideas, I am just reposting the patch I sent to
Bruce about one year ago. I have been happily using it on all my systems
since then.
Index: su.c
===================================================================
RCS file: /usr/ncvs/src/usr.bin/su/su.c,v
retrieving revision 1.50
diff -u -r1.50 su.c
--- su.c 28 May 2002 06:47:32 -0000 1.50
+++ su.c 28 May 2002 08:43:04 -0000
@@ -132,6 +132,8 @@
char *username, *cleanenv, *class, shellbuf[MAXPATHLEN];
const char *p, *user, *shell, *mytty, **nargv;
+ struct sigaction sa, sa_int, sa_quit, sa_tstp;
+
shell = class = cleanenv = NULL;
asme = asthem = fastlogin = statusp = 0;
user = "root";
@@ -314,6 +316,12 @@
* We must fork() before setuid() because we need to call
* pam_setcred(pamh, PAM_DELETE_CRED) as root.
*/
+ sa.sa_flags = SA_RESTART;
+ sa.__sigaction_u.__sa_handler = SIG_IGN;
+ sigemptyset(&sa.sa_mask);
+ sigaction(SIGINT, &sa, &sa_int);
+ sigaction(SIGQUIT, &sa, &sa_quit);
+ sigaction(SIGTSTP, &sa, &sa_tstp);
statusp = 1;
child_pid = fork();
@@ -339,6 +347,9 @@
PAM_END();
exit(1);
case 0:
+ sigaction(SIGINT, &sa_int, NULL);
+ sigaction(SIGQUIT, &sa_quit, NULL);
+ sigaction(SIGTSTP, &sa_tstp, NULL);
/*
* Set all user context except for: Environmental variables
* Umask Login records (wtmp, etc) Path
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